Mast-scraper



UNITED STATES PATENT QFFICE,

ROBERT N. TATE, OENEW LONDON,`CONNEGTICUT. i

MAST-SCRAIPER.

Specification of Letters Patent No.

To all 'whom it may concern:

Be it known that I, ROBERT N. TATE, of New London, in the county of New London and State of Connecticut, have invented a new and useful Implement or Device for Scraping the Masts of Vessels; and I do hereby declare that the following is a full, clear, and eXact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1, is a side view of my invention. Fig. 2, an end view of ditto.

Similar letters of reference indicate c0rrespending parts in the two figures. t

The object of this invention is to obtain an implement that will facilitate the scraping of the masts of vessels without injuring or cutting the same during the operation. This work is at present performed with ordi# nary knives and the operation is not only slow and tedious, but the masts are liable to be cut or scored in consequence of the comparatively straightedges of the knives acting against theconvex surfaces of the masts.

The within described invention consists in having a steel plate provided with a concave edge or edges corresponding with the conveXity of the mast or masts to be scraped, said plate being attached to a suit-able tang or handle s0 that the plate may be drawn down against the mast and a comparatively long concentric scraping surface made to act upon it. t

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A, represents a steel plate which is of trilateral form and is secured to a tang B, the latter having a shoulder a, on it against which the plate bears, and is pressed snugly against it by a nut Z9, the tang passing through the center of the plate. The tang B, is secured in a wooden handle C. The three edges or sides c, d, c, of the plate A, are concave forming portions of circles of different diameter, for instance the side c, forms a portion of a circle of l2 inches diameter, the circle corresponding with side d,

is 18 inches diameter and the circle corre- 2e,5e5, dated December 2o,` `1859.]

spending with side c, 24inches dialneter,see;` Fig. 3, in which the` smallest circle is shown 1` in red. i

Each side of theplate isibrought to c l edge by a basil on` the outer sidejof the plate;

From this description it will be seenzthat if f a mast 12 inches 1n diameter is to be scraped, .i

the side c, ofthe plate would be used and H Y at each stroke of the toola` portion fof the l `surface of the mast corresponding-in width to the length of the sidec, will beyscrajgmd.`

If the mast to be scrapedqis 118 inches in.; diameter, the side ai, is used and if 24 inches `i i t in diameter the side fe, is `operated with.; The advantage of this tool over an `ordinary `1 knife which can actl upon a smallsurface only of the mast at eachstroke will" be readily seen.

The plate edge or side, or it may be formed` with three, four, or` even `more sides."` Inthe:

A, may haveonly one concave.,I i i 1 w manufacture of themthey will probably be furnished with a differentnumber of edges] 1 `I i from one upward, the implements varymgf in price according to the number of edges or sides they may have.

I am aware that trilateral scrapersgare p now in common use `for SCaPingfthe deOkS and sides of vessels;` but thesescrapers have; i i V` scraping plane surfaces or those approXi- -l straight edges andareemployed onlyffdr` mating thereto, and` therefore `could not beF employed for scraping masts with any lbet i ter results than the knives now employed. t

I do not claim the employment or useof herein described; but,

Letters Patent,

[M a trilateral or polygonall plate as a scraper? V irrespective of the `(",oncavesides or-edges` i` edges, and attached to a lsuitable Y tang or handle, to forma new :anduseful article `of y t manufacture for the purpose herein seti forth. t H

t ROBERT N.` TATE."` Witnesses: i l y l i WM. D. PRATT,

JNO. I. G. MATHER. f i 

